A variable runner based thermal management device for power battery

Abstract

The utility model discloses a kind of power battery thermal management devices based on variable runner, which belongs to power battery thermal management technical field.It mainly includes: liquid cooling plate assembly, the liquid cooling plate assembly includes plate body and active wind control device, the one side of the plate body is fixed with inlet pipe and outlet pipe, and both and the runner being set in plate body interior are communicated;The active wind control device is fixed in the one side of plate body, and its surface is equipped with multiple air guide components.The utility model changes the runner diameter of different positions of liquid cooling plate, reduces cell temperature difference, improves cell performance, reduces safety risk.Meanwhile, active wind control device is used to assist liquid cooling plate to carry out temperature control, to further improve temperature difference control capability.The utility model is mainly used to reduce cell temperature difference, improve cell performance and safety.

Description

Technical Field

[0001] This utility model belongs to the field of power battery thermal management technology, and more specifically, it relates to a power battery thermal management device based on a variable flow channel. Background Technology

[0002] The liquid-cooled thermal management system for power batteries involves coolant flowing through liquid-cooled plates and pipes beneath the battery cells. Through heat exchange, it dissipates heat from or heats the cells. During this process, excessive temperature differences between the cells must be avoided. Excessive temperature differences negatively impact cell performance: they accelerate internal electrochemical reactions, leading to self-discharge and reduced capacity. Low temperatures also reduce cell capacity, drastically decreasing vehicle range and affecting functions such as energy recovery. Safety risks include potential thermal runaway due to inconsistent temperatures. High-temperature areas may generate more heat, triggering a chain reaction that reduces the overall safety of the battery pack, and in severe cases, even causing spontaneous combustion. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a power battery thermal management device based on a variable flow channel. This device reduces the temperature difference between battery cells, improves cell performance, and reduces safety risks by changing the flow channel diameter at different positions of the liquid cooling plate. Simultaneously, an active airflow control device assists the liquid cooling plate in temperature control, further enhancing temperature difference control capabilities.

[0004] The aforementioned power battery thermal management device based on a variable flow channel includes a liquid cooling plate assembly. The liquid cooling plate assembly includes a plate body and an active air control device. An inlet pipe and an outlet pipe are fixed on one side of the plate body, and both are connected to a flow channel disposed inside the plate body. The active air control device is fixed on one side of the plate body, and its surface is provided with multiple air guiding components.

[0005] Preferably, the flow channel is arranged in a serpentine pattern, and the first section, the second section, and the third section are connected; wherein, the second section is close to the area where the liquid inlet pipe is located, and the first section and the third section are far away from the area where the water inlet is located.

[0006] Preferably, the flow channel widths of the first and third partitions are greater than the flow channel width of the second partition.

[0007] Preferably, the active wind control device has an internal air duct, and its surface has an exhaust port and multiple air inlets connected to the air duct; wherein, the air guide component is movably connected to the active wind control device, and part of its structure is slidably connected to the air inlets.

[0008] Preferably, the sidewall of the active wind control device is provided with multiple sliding grooves, and the sliding grooves are adjacent to both ends of the air inlet.

[0009] Preferably, the air guide assembly includes an electric push rod, a connecting rod, and an air vane. The number of air vanes matches the number of air inlets, and the air vanes are fitted into and slidably connected to the air inlets. The electric push rod is fixedly connected to the active air control device, and its end is connected to a connecting rod, which is fixedly connected to the air vane.

[0010] Preferably, both ends of the air plate are provided with a first connector and a second connector, and one end of the two connectors is rotatably connected to the air plate, while the other end is embedded in the sliding groove; wherein, one side of the first connector is fixedly connected to the connecting rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By changing the flow channel diameter at different positions of the liquid cooling plate, the temperature difference of the battery cell can be reduced, the performance of the battery cell can be improved, and the safety risks can be reduced.

[0013] 2. At the same time, an active air control device is used to assist the liquid cooling plate in temperature control, further improving the temperature difference control capability. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 This is a front view of the liquid cooling plate assembly of this utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a schematic diagram of the flow channel partitioning of this utility model;

[0018] Figure 5 This is a schematic diagram of the thermal simulation of this utility model;

[0019] Figure 6 This is a front view of the active risk control device of this utility model;

[0020] Figure 7 This is a schematic diagram of the air guide component structure of this utility model.

[0021] In the figure, 1. Liquid cooling plate assembly; 10. Plate body; 11. Liquid inlet pipe; 12. Liquid outlet pipe; 13. Flow channel; 131. First zone; 132. Second zone; 133. Third zone; 2. Active air control device; 201. Air duct; 202. Exhaust port; 203. Air inlet; 204. Slide groove; 205. Sealing plate; 21. Air guide assembly; 211. Electric push rod; 212. Linkage rod; 213. Air vane; 214. First connector; 215. Second connector. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figures 1 to 3 As shown, a power battery thermal management device based on a variable flow channel includes a liquid cooling plate assembly 1. The liquid cooling plate assembly 1 includes a plate body 10 and an active airflow control device 2. An inlet pipe 11 and an outlet pipe 12 are fixed to one side of the plate body 10, and both are connected to a flow channel 13 located inside the plate body 10. The active airflow control device 2 is fixed to one side of the plate body 10, and its surface is provided with multiple air guide components 21. In this way, the liquid cooling plate assembly 1 achieves liquid circulation within the flow channel 13 through the inlet pipe 11 and the outlet pipe 12, thereby achieving the purpose of cooling or heating the power battery through heat exchange during the liquid flow. Simultaneously, the active airflow control device 2 can assist in temperature control of the liquid cooling plate assembly 1, further improving the accuracy of power battery thermal management.

[0025] like Figures 3 to 5 As shown, the flow channel 13 is arranged in a serpentine manner, and the first section 131, the second section 132, and the third section 133 are connected to each other; wherein, the second section 132 is close to the area where the liquid inlet pipe 11 is located, and the first section 131 and the third section 133 are far away from the area where the water inlet is located.

[0026] like Figure 4 and Figure 5 As shown, the width of the flow channel 13 in the first partition 131 and the third partition 133 is greater than the width of the flow channel 13 in the second partition 132. In this way, by increasing the width of the flow channel 13 in the first partition 131 and the third partition 133, on the one hand, the contact area between the flow channel 13 and the battery cell can be increased, improving the heat exchange rate; on the other hand, as the flow channel 13 widens, the coolant flow rate decreases, allowing sufficient time for heat exchange with the battery cell, thereby improving the temperature consistency of the battery cell at different locations.

[0027] Understandably, in the prior art, the width of the flow channel 13 is constant. When the battery cell is dissipating heat, the temperature of the battery cell near the inlet pipe 11 is significantly different from that of the coolant, allowing for better heat exchange. As the temperature of the coolant continues to rise, when the coolant flows through the battery cell located away from the inlet pipe 11, the temperature difference between the coolant and the battery cell at that location is smaller, resulting in poor heat dissipation and causing excessive temperature differences between the battery cells at different locations. This is also the case when the battery cell is heated.

[0028] Optionally, the specific width that needs to be increased in waterways 13 at different locations can be adjusted based on the results of thermal simulation data until the temperature reaches an acceptable range.

[0029] like Figure 6 and Figure 7 As shown, the active air control device 2 has an internal air duct 201, and its surface has an exhaust port 202 and multiple air inlets 203 communicating with the air duct 201. The air guide assembly 21 is movably connected to the active air control device 2, and a portion of its structure is slidably connected to the air inlets 203. Thus, when the liquid cooling plate assembly 1 has insufficient heat dissipation capacity or the battery cells need heating, the active air control device 2 can actively intervene to assist the liquid cooling plate assembly 1 in heat dissipation or heating, improving not only the efficiency of heat dissipation or heating but also the efficiency of power utilization.

[0030] Optionally, a sealing plate 205 is hinged to the edge of the exhaust vent 202, and a hinge spring is fixed at the hinge.

[0031] like Figure 6 and Figure 7 As shown, the active air control device 2 has multiple sliding grooves 204 on its side wall, and the sliding grooves 204 are adjacent to both ends of the air inlet 203. In this way, the sliding grooves 204 can limit the air guide assembly 21, so that the air guide assembly 21 can always slide along the sliding grooves 204, and it is not easy for it to deviate or fall off during the sliding process.

[0032] like Figure 7As shown, the air guide assembly 21 includes an electric push rod 211, a connecting rod 212, and an air vane 213. The number of air vanes 213 matches the number of air inlets 203, and the air vanes 213 are fitted into and slidably connected to the air inlets 203. The electric push rod 211 is fixedly connected to the active air control device 2, and its end is connected to the connecting rod 212, which is fixedly connected to the air vane 213. In this way, the air deflector 213, in cooperation with the electric push rod 211 and the connecting rod 212, can open or close the air inlet 203. When the heat dissipation capacity of the liquid cooling plate assembly 1 is insufficient, the electric push rod 211 and the connecting rod 212 cooperate to drive the air deflector 213 to move along the slide groove 204 towards one end. When the air deflector 213 moves into position, one end of the air deflector 213 tilts up, introducing external air into the active air control device 2. The air flows over the surface of the liquid cooling plate assembly 1, absorbs the heat of the liquid cooling plate assembly 1, and uses its air pressure to lift the sealing plate 205, which is then discharged to the outside of the active air control device 2 through the exhaust port 202. When the battery cell needs to be heated, the electric push rod 211 and the connecting rod 212 cooperate to drive the air deflector 213 to slide towards the other end, ultimately completely sealing the corresponding air inlet 203, preventing the temperature of the liquid cooling plate assembly 1 from being lost, thereby improving the heating efficiency of the battery cell.

[0033] like Figure 7 As shown, both ends of the air deflector 213 are provided with a first connecting member 214 and a second connecting member 215, with one end of each connecting member 214 rotatably connected to the air deflector 213 and the other end embedded in the slide groove 204. One side of the first connecting member 214 is fixedly connected to the connecting rod 212. In this way, the first connecting member 214 and the second connecting member 215 cooperate to ensure that the air deflector 213 can always move along the slide groove 204, further improving the limiting effect on the air deflector 213. At the same time, the first connecting member 214 and the connecting rod 212, while moving together, will not interfere with the second connecting member 215, ensuring the stable operation of the second connecting member 215.

[0034] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power battery thermal management device based on a variable flow channel, comprising a liquid cooling plate assembly (1), characterized in that: The liquid cooling plate assembly (1) includes a plate body (10) and an active air control device (2). An inlet pipe (11) and an outlet pipe (12) are fixed on one side of the plate body (10), and both are connected to a flow channel (13) inside the plate body (10). The active air control device (2) is fixed on one side of the plate body (10), and its surface is provided with multiple air guide components (21).

2. The power battery thermal management device based on a variable flow channel according to claim 1, characterized in that: The flow channel (13) is arranged in a serpentine manner, and the first section (131), the second section (132), and the third section (133) are connected; wherein, the second section (132) is close to the area where the liquid inlet pipe (11) is located, and the first section (131) and the third section (133) are far away from the area where the water inlet is located.

3. The power battery thermal management device based on a variable flow channel according to claim 2, characterized in that: The width of the flow channel (13) in the first partition (131) and the third partition (133) is greater than the width of the flow channel (13) in the second partition (132).

4. The power battery thermal management device based on a variable flow channel according to claim 1, characterized in that: The active wind control device (2) has an internal air duct (201) and an exhaust port (202) and multiple air inlets (203) connected to the air duct (201) on its surface; wherein, the air guide component (21) is movably connected to the active wind control device (2) and part of its structure is slidably connected to the air inlets (203).

5. A power battery thermal management device based on a variable flow channel according to claim 4, characterized in that: The active wind control device (2) has multiple grooves (204) on its side wall, and the grooves (204) are adjacent to both ends of the air inlet (203).

6. The power battery thermal management device based on a variable flow channel according to claim 1, characterized in that: The air guide assembly (21) includes an electric push rod (211), a connecting rod (212), and a wind plate (213). The number of wind plates (213) matches the number of air inlets (203), and the wind plates (213) are fitted into the air inlets (203) and slidably connected to them. The electric push rod (211) is fixedly connected to the active air control device (2), and its end is connected to the connecting rod (212), and the connecting rod (212) is fixedly connected to the wind plate (213).

7. A power battery thermal management device based on a variable flow channel according to claim 6, characterized in that: Both ends of the wind plate (213) are provided with a first connector (214) and a second connector (215), and one end of the two connectors is rotatably connected to the wind plate (213), and the other end is embedded in the slide groove (204); wherein, one side of the first connector (214) is fixedly connected to the connecting rod (212).

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